To add to omahabob's post, the helicopter tour I did met at the shopping center a short walk from the ship and shuttled us to the airport. It wasn't cheap, but worth every penny, especially now since NCL has dropped the Na Pali sailby portion on the trip. We booked the tour after finding out we were to miss it due to "maintenance issues" and really wanted to see the cliffs and the helicopter is a great way to do so!